As we saw in last week's season premiere of
"Supernatural," Dean (
Jensen Ackles) and the vampire Benny (Ty Olsson), formed an extremely strong bond during their time together in Purgatory. That will grow even more evident in the show's Halloween episode, "Blood Brother" -- because in this case, "brother" definitely isn't referring to the Winchester siblings.

If you read our "Supernatural" vampire primer, you know that the only thing that can cure vampirism is blood from a vampire's sire, or "Maker." As far as we know, the cure needs to happen before a vampire has his first taste of human blood, but nonetheless, in "Blood Brother," Benny decides to go after his Maker, played by guest star Patrick Stafford.

When a pack of vampires beat the you-know-what out of Benny, he calls Dean for help. Surprisingly, Dean doesn't hesitate at all. According to The CW, he "abruptly packs up and tells a confused Sam (
Jared Padalecki) that he's taking a 'personal day.'"

The episode is packed with flashbacks to Dean's time in Purgatory, when apparently, Benny helped him and Castiel (Misha Collins) out on several occasions. We'll also see more flashbacks to Sam's life with Amelia (Liane Balaban). All of their reflection and reminiscing comes to a halt, though, when Dean has to call Sam to get him and Benny out of a bind. The episode was written by Ben Edlund and directed by Guy Bee, so you know we're in for quite a ride.

Of course, it airs on Oct. 31, Halloween, at 9 p.m. EST. In the meantime, check out this new "Supernatural" poster hot off The CW presses. No, it doesn't include new photos, but the image of Castiel and Crowley standing on opposite sides of the road could be foreshadowing for the rest of the season.